code: def test_back_and_forth(
      transform: transforms.Transform, string: str
  ) -> None:
      x = np.random.normal(0, 1, size=12)
      y = transform.forward(x)
      x2 = transform.backward(y)
      np.testing.assert_array_almost_equal(x2, x)
      np.testing.assert_equal(transform.name, string)
  
file_path: nevergrad/nevergrad/parametrization/test_transforms.py
imports: import typing
  import pytest
  import numpy
  from ..common import testing
  from .None import transforms
label_desc: Use image node_id 1 for calling a global function with example usage: test_back_and_forth(transform, string) without return types